What every IT person needs to know about OpenBSD
"Functional, free and secure by default", OpenBSD remains a crucial yet largely unacknowledged player in the open source field. This talk aims to highlight the project's signature security features and development practices -- razor sharp focus on correct and secure code coupled with continuing code audit -- as well as the project's role as source of innovation in security practices and 'upstream' source for numerous widely used components such as OpenSSH, PF, LibreSSL and others.
Source: What every IT person needs to know about OpenBSD, an article by Peter N. M. Hansteen.